A Reconfigurable Triple-Notch-Band Antenna Integrated with Defected Microstrip Structure Band-Stop Filter for Ultra-Wideband Cognitive Radio Applications

Table 1

Eight switchable cases and corresponding notch bands.

Case	Notch bands (GHz)	SW1	SW2	SW3	SW4
1	5.5, 6.8, 11.5	OFF	OFF	OFF	OFF
2	5.5, 11.5	OFF	OFF	OFF	ON
3	8.7	ON	OFF	OFF	ON
4	8.7	OFF	ON	ON	ON
5	6.8, 8.7	ON	OFF	OFF	OFF
6	6.8, 8.7	OFF	ON	ON	OFF
7	6.8	ON	ON	ON	OFF
8	None (UWB antenna)	ON	ON	ON	ON